编译libRTMP(RTMPdump) For iOS

参考网址：http://blog.csdn.net/cjj198561/article/details/28955461

1.编译librtmp需要先编译openssl，因为librtmp依赖openssl

首先编译openssl：
(去openssl网站下载所需文件，当前稳定版本为openssl-1.0.2h.tar.gz),下面为已经下好的附件。 http://pan.baidu.com/s/1cJq0Ke
把以下内容保存为shell脚本（后缀为.sh）下面为已经写好的文件 http://pan.baidu.com/s/1b53aAa
#!/bin/sh
VERSION="1.0.1h" #指明openssl的版本信息，比如下载的是openssl-1.0.1h.tar.gz那么对于就填写1.0.1h

SDKVERSION="7.1" #指明ios sdk的版本号，目前最新的是7.1，不清楚的同学可以 ls /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.1.sdk/ 一下看看自己的iPhoneOS7.1.sdk是不是7.1

CURRENTPATH=`pwd`

ARCHS="i386 armv7 armv7s arm64"

BUILDPATH="${CURRENTPATH}/build"

LIBPATH="${CURRENTPATH}/lib"

INCLUDEPATH="${CURRENTPATH}/include"

SRCPATH="${CURRENTPATH}/src"

LIBSSL="libssl.a"

LIBCRYPTO="libcrypto.a"

DEVELOPER=`xcode-select -print-path`

if [ ! -d "$DEVELOPER" ]; then

echo "xcode path is not set correctly $DEVELOPER does not exist (most likely because of xcode > 4.3)"

echo "run"

echo "sudo xcode-select -switch <xcode path>"

echo "for default installation:"

echo "sudo xcode-select -switch /Applications/Xcode.app/Contents/Developer"

exit 1

fi

set -e

if [ ! -e openssl-${VERSION}.tar.gz ]; then

echo "Downloading openssl-${VERSION}.tar.gz"

curl -O http://www.openssl.org/source/openssl-${VERSION}.tar.gz
else

echo "Using openssl-${VERSION}.tar.gz"

# Remove the source directory if already exist

rm -rf "${SRCPATH}/openssl-${VERSION}"

fi

mkdir -p "${SRCPATH}"

mkdir -p "${BUILDPATH}"

mkdir -p "${LIBPATH}"

mkdir -p "${INCLUDEPATH}"

tar zxf openssl-${VERSION}.tar.gz -C "${SRCPATH}"

cd "${SRCPATH}/openssl-${VERSION}"

LIBSSL_REPO=""

LIBCRYPTO_REPO=""

for ARCH in ${ARCHS}

do

if [ "${ARCH}" == "i386" ];

then

PLATFORM="iPhoneSimulator"

else

sed -ie "s!static volatile sig_atomic_t intr_signal;!static volatile intr_signal;!" "crypto/ui/ui_openssl.c"

PLATFORM="iPhoneOS"

fi

export CROSS_TOP="${DEVELOPER}/Platforms/${PLATFORM}.platform/Developer"

export CROSS_SDK="${PLATFORM}${SDKVERSION}.sdk"

export BUILD_TOOLS="${DEVELOPER}"

echo "Building openssl-${VERSION} for ${PLATFORM} ${SDKVERSION} ${ARCH}"

echo "Please stand by..."

export CC="${BUILD_TOOLS}/usr/bin/gcc -arch ${ARCH}"

OUTPATH="${BUILDPATH}/openssl-${PLATFORM}${SDKVERSION}-${ARCH}.sdk"

mkdir -p "${OUTPATH}"

LOG="${OUTPATH}/build-openssl-${VERSION}.log"

if [[ "$VERSION" =~ 1.0.0. ]]; then

./Configure BSD-generic32 --openssldir="${OUTPATH}" > "${LOG}" 2>&1

else

./Configure iphoneos-cross --openssldir="${OUTPATH}" > "${LOG}" 2>&1

fi

# add -isysroot to CC=

sed -ie "s!^CFLAG=!CFLAG=-isysroot ${CROSS_TOP}/Platforms/${PLATFORM}.platform/Developer/SDKs/${CROSS_SDK} -miphoneos-version-min=7.0 !" "Makefile"

make >> "${LOG}" 2>&1

make install >> "${LOG}" 2>&1

make clean >> "${LOG}" 2>&1

LIBSSL_REPO+="${OUTPATH}/lib/${LIBSSL} "

LIBCRYPTO_REPO+="${OUTPATH}/lib/${LIBCRYPTO} "

done

echo "Build library..."

lipo -create ${LIBSSL_REPO}-output ${LIBPATH}/${LIBSSL}

lipo -create ${LIBCRYPTO_REPO}-output ${LIBPATH}/${LIBCRYPTO}

cp -R ${BUILDPATH}/openssl-iPhoneSimulator${SDKVERSION}-i386.sdk/include/openssl ${INCLUDEPATH}/

echo "Building done."

echo "Cleaning up..."

rm -rf ${SRCPATH}/openssl-${VERSION}
echo "Done."

保存脚本，添加脚本的执行权限（chmod +x 脚本名称）(将脚本文件.sh和openssl-1.0.2h.tar.gz文件放在同一目录下，运行”终端"并cd到这一目录下,执行”chmod +x buildOpenSSL-iOS.sh”。PS：因为咱的脚本文件叫"buildOpenSSL-iOS.sh")

运行脚本(执行”./buildOpenSSL-iOS.sh")

不出意外是可以编译成功的，如果失败，可以以打开那个log文件，查看失败原因。

编译成功以后，把lib文件和include拷贝到你的librtmp目录（可以新建一个空得librtmp目录），在librtmp目录里面同样写一个shell脚本，脚本如下：(下面为已经写好的文件) http://pan.baidu.com/s/1miLDTFy
#!/bin/sh
SDKVERSION="7.1" #这里跟openssl的地方是一个意思

CURRENTPATH=`pwd`

ARCHS="i386 armv7 armv7s arm64"

LIBPATH="${CURRENTPATH}/lib" #这里就是刚才拷贝过来的目录，不要修改，因为librtmp最后生成的也放到了这个下面

INCLUDEPATH="${CURRENTPATH}/include" #这里就是刚才拷贝过来的目录，不要修改，因为librtmp最后生成的也放到了这个下面

LIBRTMPREPO="git://git.ffmpeg.org/rtmpdump"

BUILDPATH="${CURRENTPATH}/build"

SRCPATH="${CURRENTPATH}/src"

LIBRTMP="librtmp.a"

DEVELOPER=`xcode-select -print-path`

if [ ! -d "$DEVELOPER" ]; then

echo "xcode path is not set correctly $DEVELOPER does not exist (most likely because of xcode > 4.3)"

echo "run"

echo "sudo xcode-select -switch <xcode path>"

echo "for default installation:"

echo "sudo xcode-select -switch /Applications/Xcode.app/Contents/Developer"

exit 1

fi

# Check whether openssl has already installed on the machine or not.

# libcrypt.a / libssl.a

set -e

echo 'Check openssl installation'

if [ -f "${LIBPATH}/libcrypto.a" ] && [ -f "${LIBPATH}/libssl.a" ] && [ -d "${INCLUDEPATH}/openssl" ]; then

echo 'Openssl for iOS has already installed, no need to install openssl'

else

echo 'Openssl for iOS not found, will install openssl for iOS'

./build-libssl.sh

echo 'Succeeded to install openssl'

fi

# Download librtmp source code from git repository

# We assuem the user already installed git client.

echo 'Clone librtmp git repository'

# Remove the directory if already exist

rm -rf "${SRCPATH}/rtmpdump"

git clone ${LIBRTMPREPO} src/rtmpdump

cd "${SRCPATH}/rtmpdump/librtmp"

LIBRTMP_REPO=""

for ARCH in ${ARCHS}

do

if [ "${ARCH}" == "i386" ];

then

PLATFORM="iPhoneSimulator"

else

PLATFORM="iPhoneOS"

fi

export CROSS_TOP="${DEVELOPER}/Platforms/${PLATFORM}.platform/Developer"

export CROSS_SDK="${PLATFORM}${SDKVERSION}.sdk"

export BUILD_TOOLS="${DEVELOPER}"

echo "Building librtmp for ${PLATFORM} ${SDKVERSION} ${ARCH}"

echo "Please wait..."

# add arch to CC=

sed -ie "s!AR=\$(CROSS_COMPILE)ar!AR=/usr/bin/ar!" "Makefile"

sed -ie "/CC=\$(CROSS_COMPILE)gcc/d" "Makefile"

echo "CC=\$(CROSS_COMPILE)gcc -arch ${ARCH}" >> "Makefile"

export CROSS_COMPILE="${DEVELOPER}/usr/bin/"

export XCFLAGS="-isysroot ${CROSS_TOP}/SDKs/${CROSS_SDK} -miphoneos-version-min=7.0 -I${INCLUDEPATH} -arch ${ARCH}"

if [ "${ARCH}" == "i386" ];

then

export XLDFLAGS="-L${LIBPATH} -arch ${ARCH}"

else

export XLDFLAGS="-isysroot ${CROSS_TOP}/SDKs/${CROSS_SDK} -miphoneos-version-min=7.0 -L${LIBPATH} -arch ${ARCH}"

fi

OUTPATH="${BUILDPATH}/librtmp-${PLATFORM}${SDKVERSION}-${ARCH}.sdk"

mkdir -p "${OUTPATH}"

LOG="${OUTPATH}/build-librtmp.log"

make SYS=darwin >> "${LOG}" 2>&1

make SYS=darwin prefix="${OUTPATH}" install >> "${LOG}" 2>&1

make clean >> "${LOG}" 2>&1

LIBRTMP_REPO+="${OUTPATH}/lib/${LIBRTMP} "

done

echo "Build universal library..."

lipo -create ${LIBRTMP_REPO}-output ${LIBPATH}/${LIBRTMP}

mkdir -p ${INCLUDEPATH}

cp -R ${BUILDPATH}/librtmp-iPhoneSimulator${SDKVERSION}-i386.sdk/include/ ${INCLUDEPATH}/

echo "Building done."

echo "Cleaning up..."

rm -rf ${SRCPATH}/rtmpdump

echo "Done."

保存脚本(运行”终端"并cd到这一目录下,执行”chmod +x buildLibRTMP-iOS.sh”。PS：因为咱的脚本文件叫"buildLibRTMP-iOS.sh")

运行脚本(执行”./buildOpenSSL-iOS.sh")

不出意外就编译成功了。

OK，include文件夹中是openssl和librtmp的头文件，lib中有相应的静态库
build的各个版本的lib中，会有相应版本的.a库，例如arm64,arm7s等，可以用下面的方法将几个静态库合并成一个库
lipo -create arm64.a的地址 arm7s.a的地址 armv7.a的地址 i386.a的地址 -output 合并库.a的地址
例如：lipo -create /Users/Travis/Desktop/libIMIUI.d.a /Users/Travis/Desktop/libIMIUI.s.a -output /Users/Travis/Desktop/libIMIUI.a

最后得到的文件： http://pan.baidu.com/s/1qY5WFTi